### Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [ ] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the UI/UX checklist
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

#### Closes #52702

### Video 

[Screencast from 2026-03-30
13-17-08.webm](https://github.com/user-attachments/assets/8b0f6927-04d2-406b-b7fd-064a730b2f86)

Release Notes:

- Fixed the Inline Assist button showing in the Project Diagnostics
toolbar when the agent is disabled.